Question

Evaluate the expression. Use estimation to check your answer. GASOLINE PRICES Last month the price of gasoline was \(\$ 1.19\) per gallon. This month the price of gasoline is \(\$ 1.13\) per gallon. What was the change in the price per gallon of gasoline?

Short answer

The change in the price per gallon of gasoline from last month to this month is -\$0.06.

Step-by-step solution

Identify Initial and Final Prices

Firstly, we have to identify the initial price of gasoline, which was \$1.19 per gallon last month. Then, identify the final price of gasoline, which is \$1.13 per gallon this month.

Calculate the Change

To calculate the change in the price, subtract the final price from the initial price. That is, \( \$1.19 - \$1.13 = \$0.06 \). The change in the price per gallon of gasoline is therefore \( \$0.06 \).

Verify with Estimation

In this step, round off the initial and final prices to integers, say \$1.00 and \$1.00 respectively. The estimated change in price, therefore, is \( \$1.00 - \$1.00 = \$0.00 \). This estimated change is near to our calculated change in the price per gallon of gasoline.